Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5418df604f3237…

MALICIOUS

PDF

37.8 KB Created: 2020-08-26 19:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08ce2cd6acaf0dd034759e15caf44e4c SHA-1: e85ba56d4b4fe009da3e05ca27ca2736133c94e3 SHA-256: 0a5418df604f32377c601e03fa788c6b7329ca734f159cf675d3976c27a77306
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a physics textbook, which is likely a pretext to disguise the malicious intent. The presence of many external links, including a link farm heuristic, suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=physics+douglas+c+giancoli+7th+editi
    • http://putofun.kilmantinarts.com/uploads/1/3/0/9/130969191/2326043.pdf
    • http://files.koiknowledge.com/uploads/1/3/0/8/130874067/vofuveror.pdf
    • http://files.olgasplaces.com/uploads/1/3/0/7/130775163/2afeaa1a897.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/devumonaxidurilupafulawo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2679/files/brittany_renner_judge_this_cover.pdf
    • https://cdn.shopify.com/s/files/1/0448/6434/0130/files/my_talking_angela_mod_apk_unlimited_money.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/nellly_furtado_all_good_things.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1349/files/80514504975.pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/8999/files/24544314554.pdf
    • https://cdn.shopify.com/s/files/1/0437/8420/8545/files/bel_ami_livre.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/zuzuposazorat.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/inkscape_manual_free_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055b5.bin
929f74f10d6b8fb60f3c3c6adadcbc32c2b764172842486bc037353c07ac98f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B5 5288 bytes
font_01_sfnt_off000067af.bin
402a2887daa8dc334ffb105db1845b854dd22f90bf5cf300396df52be40d6de3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67AF 10280 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.